mmc: dw_mmc: let device core setup the default pin configuration

With device core now able to setup the default pin configuration,
the pin configuration code based on the deprecated Samsung specific
gpio bindings is removed.
Signed-off-by: NThomas Abraham <thomas.abraham@linaro.org>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Reviewed-by: NDoug Anderson <dianders@chromium.org>
Tested-by: NDoug Anderson <dianders@chromium.org>
Acked-by: NSeungwon Jeon <tgih.jun@samsung.com>
Signed-off-by: NChris Ball <cjb@laptop.org>

drivers/mmc/host/dw_mmc-exynos.c

@@ -152,43 +152,6 @@ static int dw_mci_exynos_parse_dt(struct dw_mci *host)
 	return 0;
 }
 
-static int dw_mci_exynos_setup_bus(struct dw_mci *host,
-				struct device_node *slot_np, u8 bus_width)
-{
-	int idx, gpio, ret;
-
-	if (!slot_np)
-		return -EINVAL;
-
-	/* cmd + clock + bus-width pins */
-	for (idx = 0; idx < NUM_PINS(bus_width); idx++) {
-		gpio = of_get_gpio(slot_np, idx);
-		if (!gpio_is_valid(gpio)) {
-			dev_err(host->dev, "invalid gpio: %d\n", gpio);
-			return -EINVAL;
-		}
-
-		ret = devm_gpio_request(host->dev, gpio, "dw-mci-bus");
-		if (ret) {
-			dev_err(host->dev, "gpio [%d] request failed\n", gpio);
-			return -EBUSY;
-		}
-	}
-
-	if (host->pdata->quirks & DW_MCI_QUIRK_BROKEN_CARD_DETECTION)
-		return 0;
-
-	gpio = of_get_named_gpio(slot_np, "samsung,cd-pinmux-gpio", 0);
-	if (gpio_is_valid(gpio)) {
-		if (devm_gpio_request(host->dev, gpio, "dw-mci-cd"))
-			dev_err(host->dev, "gpio [%d] request failed\n", gpio);
-	} else {
-		dev_info(host->dev, "cd gpio not available");
-	}
-
-	return 0;
-}
-
 /* Common capabilities of Exynos4/Exynos5 SoC */
 static unsigned long exynos_dwmmc_caps[4] = {
 	MMC_CAP_UHS_DDR50 | MMC_CAP_1_8V_DDR |
@@ -205,7 +168,6 @@ static const struct dw_mci_drv_data exynos_drv_data = {
 	.prepare_command	= dw_mci_exynos_prepare_command,
 	.set_ios		= dw_mci_exynos_set_ios,
 	.parse_dt		= dw_mci_exynos_parse_dt,
-	.setup_bus		= dw_mci_exynos_setup_bus,
 };
 
 static const struct of_device_id dw_mci_exynos_match[] = {

drivers/mmc/host/dw_mmc.c

@@ -1952,14 +1952,6 @@ static int dw_mci_init_slot(struct dw_mci *host, unsigned int id)
 	else
 		bus_width = 1;
 
-	if (drv_data && drv_data->setup_bus) {
-		struct device_node *slot_np;
-		slot_np = dw_mci_of_find_slot_node(host->dev, slot->id);
-		ret = drv_data->setup_bus(host, slot_np, bus_width);
-		if (ret)
-			goto err_setup_bus;
-	}
-
 	switch (bus_width) {
 	case 8:
 		mmc->caps |= MMC_CAP_8_BIT_DATA;

drivers/mmc/host/dw_mmc.h

@@ -190,7 +190,6 @@ extern int dw_mci_resume(struct dw_mci *host);
  * @prepare_command: handle CMD register extensions.
  * @set_ios: handle bus specific extensions.
  * @parse_dt: parse implementation specific device tree properties.
- * @setup_bus: initialize io-interface
  *
  * Provide controller implementation specific extensions. The usage of this
  * data structure is fully optional and usage of each member in this structure
@@ -203,7 +202,5 @@ struct dw_mci_drv_data {
 	void		(*prepare_command)(struct dw_mci *host, u32 *cmdr);
 	void		(*set_ios)(struct dw_mci *host, struct mmc_ios *ios);
 	int		(*parse_dt)(struct dw_mci *host);
-	int		(*setup_bus)(struct dw_mci *host,
-				struct device_node *slot_np, u8 bus_width);
 };
 #endif /* _DW_MMC_H_ */